Machine for cutting worms.



w. E BOCK. MACHINE FOR CUTTING WORMS.

I APPLICATION HLED MAY 4. 1914, 1 ,T/5,9 5 0 Patented Aug 13,; 1918,

3 SHEET$-SHEET I I Jam/m1; 71512! M? 372 a? Bad if WITNESSES MKZMZ W 61 w. E. 800K. I MACHINE FOR CUTTING WORMS.

APPLICATION FILED MAY 4. 1914.

Patented Aug. 18, 1918 1 z w a 19%?959 I 3 SHEETS-SHEET 2.

H ill] IIHH H HM? mm mum s \lllllll MHHH IHII H HHHHHHIH I u N {if M gm mmvron WITNESSES: WMim W y 3M- {J @M f Y- W W ATTORNEYIS w. E. BOOK. MACHINE FOR CUTTING WORMS.

' f APPLICATION FILED MAY 4. 1914. i yfi gfifi o Patented Aug, 13, 1918.

a smznssnan a I INVEIVTUR W522 zam 177172? 306 7% WITNESSES;

BY QWMM- MW @WW harness.

WILLIAM EMIL 1800K, on 'roLnno, onto, ASSIGNOR TO THE IBOCK WORM GEAR COMPANY,

or CLEVELAND, cure, a ooterone'rrou or 01-110.

MACHINE FOR QUTTINGT WORMS.

To all whom it may concern:

Be it known thatI VVILLIAM Eri'rm Boon, a citizen of the United States of Alnerica, residing at Toledo, in the county of Lucas and State of @hio, have invented ,certain new and useful. Improvements in Machines for Cutting orms, of wl ich tlie fdllowing is a specification, reference being bad therein to the accompanying drawing. l

The invention relates to rhachines for cut ting worms or spiral gears and more partichlarly to that class designed foruse in coppcration with gears having roller teeth. It is the object oftthe invention to provide a sgmple mechanism tor fcutting blanks of var ious dimensions to any selectedpitch;

1n the drawings clamping bolts F is a rotary head se' cured in an annular bearing G mounted on the frame A; adjacent to the work arbor and with its axis in a plane perpendicular :to the axis of said arbor.

and carrying a journal bearing I for the arbor J of the rotary cutting tool. The head H may be adjusted to vary the eccentricity of the arbor J, being clamped in difl'erent positions by the clan'iping screws H. The bearing 1 is also adjustable axially thereof in relation to thev head H by suitable means,

such as the screw K engaging a threaded aperturein the flange K on the bearing 1. The arbor J is revolved by a gear-wheel. L which is in mesh with a pinion M upo :ra shaft M normally concentric with thel o tary head F,- the pinion being of greater width than the gearwvheel to permit the longitudinal adjustment of the arbor and its journal hearing! I. The pmlon M isdriven from a pulley M", municatcd by suitable means (not shown).

To perform the work of cutting the worm, the blank carryii'ig arbor D and the rotary head} are revolved in-timed relation to each Figure "s a side elevation of the ma H is a radially adjuste ble head mountedupon the rotary head 1 to which motion is comother. This is accomplished by an intermediate gearing, including change-gears Specification of Letters Patent. Patented Aug, 13, 191$? a ucaaonfmd May 4, 1914. Serial No. 836,307.

which may be'adjusted to obtain the desired ratio of movement. As shown, the rotary head F has worm-gear teeth F formed on the periphery thereof, which are in rnesh with a worm upon a shaft'o, having a pinion P .in mesh with change-gears mounted on the adjustable plate Q. These changegears complete a driving connection with a gear-wheel'R on the blank-carrying' arbor I), and thus the head F and arbor D .are compelled to rotate in a predetermined relation. Movement may be imparted to the train by any suitable means, but as shown a worm ear 0 attached to the shaft 0' is driven a worm S upon the shaft S and may be also hand operated by means of ahandle O on the wheel O 'when the worm has been disengaged from the worm gear "O -,(not shown). Provision is also made" for the independent rotation of the arbor D in setting-the work, this being accompl'ished by providing the ear wheel R with a rotary ad ustable ring R secured in different positions of adjustment by clamps R With the construction as described, in performing the work, the-blank from which'the worm is to be out is first mounted upon the arbor D and the latter is then adjusted the" proper distance from the center of the ro-' tary head F to correspond to the roller gear which isto cooperate with the worm. This adjust ment is e'fi'ected by loosening the elamplng bolts E and adjusting the bearings C. .The head H is then adjusted upon the roller head F to produce the desired eccen ty f the axis'ol the arbor Jand hear-- ing I, and the latter is adjusted by the screw K to move thecutter 1 toward or from the axis of the blank arbor D. Thus; by means of these various adjustments the machine may be set to correspond to the particular" wormwhich is to be cut, and the pitch of this worm may be varied by the, changegears Q. Motion is then'communicated to the rotary cutter-through the medium of the pulley M pinion M, gearwl1eel L, and arbor J', and at the same time motion com municated .to the rotary head l and the blank-carrying arbor D through the drive coi'mection described. Thiswill pause the timed rotation of the head F and arbor D1,,

with a result that the cutter l will trace a rim spiral groove in the blank of the proper form to maintain rolling Contact with the roller teeth of the cooperating gear. Where there are a plurality of grooves to be cut in the same blank, by loosening the clamps R and shifting the gear rim R on the gearwheel R, the blank may be properly set'ior the cutting of the second groove.

It WlllbG understood that the Worm cut bythe machine as described will perfectly fit a cooperating gear, as the path of movement of the cutter I exactly corresponds to the path of movement of the teeth on said cooperating gearf "it will be also understood that where hardened Wcu'ms are used they may be trued after the hardening process by substituting a grinder wheel for the cutter I.

What I claim as my invention is l. lhe combination with a frame, of a rotary blank-holding arbor mounted thereon, a rotary cutter on an axis transverse to the axis of said blank-holding arbor, rota-- table in a path ofiset therefrom and parallel thereto, and timed mechanism for rotating said cut said arbor and relatively moving ter laterally and longitudinally in relation thereto to cut a spiral groove of a predetermined pitch.

2. The combination with a frame, of a rotary blank-carrying arbor mounted there-- on, a rotary head having its axis transverse to that of said arbor, a cutter arbor mounted eccentrically in said head, a cutter on said cutter arbor for engaging the blank, adapt ed to rotate partially on opposite sides of the horizontal plane passing through the longitudinal axis ofthe blank, and a change gearing intermediate said rotary head. and

\\'ork-holding arbor for obtaining a predetermined ratio of movement thereof.

3. The combination with a rotary blankbearing arbor, of a cutter arbor extending transversely thereto, a rotary member in which said cutter arbor iseccentrically j ourQ naled, a cutter on said arbor for engaging the blank, rotatable in a path offset from the axis of said blank-bearing arbor and parallel thereto, and means for relatively rotating said rotary member and rotary blank-bearing arbor in timed relation to each other.

t. The combination with bed, or ablankholding arbor mounted thereon, a rotary head having its 1 transverse to the axis of said arbor, an annular bearing in which said head. rotates, a cutter arbor, a for said cutter arbor radially adjustably secured to said rotary head parallel tothe thereof, a cutter on. said arbor for ture in presence of two wit the blank, and a change-gear connection betvvecn said rotary head and blank-holding arbor.

5. The combination with frame,. of a rotary blank-holding arbor mounted thereon, a rotarynead having its axis transverse to that of said arbor, a cutter arbor eccentri' cally journaled in said head and parallel to the axis thereof, connecting mechanism between said rotary head and work holding arbor, including a change-gear, and means for rotatively adjusting said blank-holding arbor independent of said connecting mechanism.

(t. The combination with a frame, of a re; tary blank-holding arbor mounted thereon, a rotary head having its axis transverse to the axis of said blank-holding arbor a cutter arbor eccent'rically journaled in said rotary head, an annular bearing for said rotary head, a peripheral worm gear on said rotary head, a Worm engaging the same, a shaft on which said worm is mounted parallel to said blank-carrying arbor, a change-gearing be-' tween. said shaft and arbor. and means per-- mitting of the rotative adjustment in said change-gearing for setting said arbor in predetermined relation to said rotary head.

7. The combination with a frame, of a rotary blankholding; arbor adjustably mounted thereon, means for adjusting said arbor, a cutter arbor extending transversely to said rotary blank-holding arbor, a rotary member in which said cutter arbor is adjustably radially journaled, means for adjusting said cuttarbor, a cutter on said arbor for engaging the blank, and means for relatively rotating said rotary member and rotary blank-holding arbor in timed relation to each other.

8. The combination with a rotary blankbearing arbor, of a cutter arbor extending transversely thereto, a rotary member carrying said cutter arbor, a cutter on said outter arbor for engaging the blank, means for pendent of said rotary member, including a gear Wheel having a rotary gear rim adjustably' secured to the body portion of said gear wheel.

In testimony whereof 1 n w A my signa- WILLIAM EMIL BUCK. 

